My Inquiry
My Account
Analog Devices Inc. AD7853BRZ-REEL
- Part No.:
- AD7853BRZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7853BRZ-REEL.pdf
- Description:
- IC ADC 12BIT SAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,382
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7853BRZ-REEL from Analog Devices is a 12-bit, 200 kSPS pseudo-differential successive approximation register (SAR) ADC operating from a single 3 V to 5.5 V supply. It features on-chip 2.5 V reference, self- and system-calibration, and SPI/QSPI/8051-compatible serial interface. Designed for portable instrumentation and battery-powered data acquisition, it delivers ±1 LSB integral nonlinearity, 71 dB SNR at 10 kHz input, and 4.6 µs conversion time.
For engineers reviewing the AD7853BRZ-REEL datasheet, AD7853BRZ-REEL pinout, AD7853BRZ-REEL application, or AD7853BRZ-REEL equivalent, key selection considerations include its read-only default operation, flexible power-down modes (25 µW sleep), unipolar/bipolar input range selection via AMODE, and compatibility with 3 V–5 V microcontroller I/O levels without level-shifting.
Technical Context
The AD7853BRZ-REEL implements a charge redistribution SAR architecture with integrated track-and-hold (500 ns acquisition), internal 2.5 V reference buffer, and calibration memory. Its control logic supports five serial interface modes selected by SM1/SM2 pins, with SCLK polarity configurable via POLARITY pin.
Calibration is managed through dedicated CAL pin triggering and internal registers; self-calibration requires 31.25 ms at 4 MHz CLKIN, while system offset calibration completes in 3.47 ms. The device retains calibration data during SLEEP mode, enabling rapid wake-up without recalibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 0.024% of full-scale for precise sensor digitization |
| Throughput Rate | 200 kSPS - supports real-time sampling of audio-band and control-loop signals |
| INL / DNL | ±1 LSB max / ±1 LSB max - guarantees monotonicity and no missing codes across temperature |
| SNR | 71 dB min at 10 kHz - enables >11.5 effective bits for high-fidelity signal capture |
| Power Dissipation | 20 mW max at 5.5 V - balances speed and efficiency for portable systems |
| Supply Range | 3.0 V to 5.5 V - interoperable with both 3.3 V and 5 V logic domains |
| Reference | Internal 2.5 V ±20 ppm/°C - eliminates external reference component and layout complexity |
Pinout & Package
AD7853BRZ-REEL is housed in a 24-lead SOIC (R-24) package with standard 0.3-inch body width and 1.27 mm pitch. Pin 11 is NC; AGND appears at pins 6 and 12 for analog ground separation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST | Convert Start Input | Edge-triggered control initiating T/H hold and conversion; tied to DVDD if unused |
| BUSY | Conversion Status Output | Active-high open-drain signal indicating active conversion or calibration |
| SLEEP | Power-Down Control | Logic 0 disables all circuitry including reference; calibration data retained |
| REFIN/REFOUT | Reference I/O | Provides 2.5 V output or accepts external 1.2 V–VDD reference; requires CREF1/CREF2 decoupling |
| AIN(+), AIN(–) | Pseudo-Differential Inputs | Support unipolar (0 to VREF) or bipolar (±VREF/2) ranges selected by AMODE pin |
| AMODE | Analog Range Select | Logic 0 = 0–VREF; Logic 1 = –VREF/2 to +VREF/2 - configures input topology without software |
| DIN/DOUT/SCLK/SYNC | Serial Interface | Configurable SPI-compatible port supporting master/slave, continuous/discontinuous clocking |
Key Features
| Feature | Design Value |
|---|---|
| Autocalibration on Power-Up | Automatic self-calibration triggered by 10 nF capacitor on CAL pin eliminates manual initialization |
| Flexible Power Management | Three low-power states: normal (20 mW), partial power-down (400 µA), full power-down (5 µA with clock off) |
| Pseudo-Differential Input Architecture | Rejects common-mode noise up to AVDD while supporting rail-to-rail input swing relative to AIN(–) |
| Hardware-Configured Serial Interface | SM1/SM2/POLARITY pins set interface mode and clock polarity-no firmware configuration required |
| On-Chip Reference Buffer | 2.5 V output stable over temperature (20 ppm/°C) and load, reducing BOM count and PCB area |
Applications
| Portable Medical Instrumentation | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous ECG waveform digitization in handheld patient monitors with 24-hour battery life. IC Role / Device Role / Timing Role: Primary analog front-end ADC acquiring 12-bit samples at 200 kSPS with built-in reference and calibration. Use Value: Eliminates external reference and calibration circuitry, reducing size and power while maintaining ±1 LSB linearity over temperature. |
Use Scenario: Environmental sensor node measuring temperature, humidity, and pressure in remote field deployments. IC Role / Device Role / Timing Role: Low-power SAR ADC performing burst-mode sampling every 10 seconds with automatic power-down between conversions. Use Value: Achieves 25 µW sleep power consumption and retains calibration data, enabling multi-year operation on coin-cell batteries. |
| Industrial Control Loop Sampling | Pen-Based Computing Interfaces |
Use Scenario: Closed-loop motor current sensing and feedback in compact servo drives requiring <1 µs latency. IC Role / Device Role / Timing Role: High-speed ADC capturing current shunt voltage with 4.6 µs conversion and hardware-triggered CONVST. Use Value: Enables deterministic timing via edge-triggered conversion start and BUSY flag, simplifying real-time interrupt handling. |
Use Scenario: Digitizing analog stylus position and pressure signals in tablet PCs with touch-sensitive displays. IC Role / Device Role / Timing Role: Pseudo-differential ADC accepting bipolar inputs from resistive touch layers with AMODE-configured range. Use Value: Supports direct connection to ratiometric touch sensors without external op-amps or level-shifting components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7853LBRZ-REEL | 100 kSPS throughput, 6.85 mW power at 3.6 V - optimized for ultra-low-power operation | Preferred where sample rate ≤100 kSPS suffices and sleep current <5 µA is critical | Select when battery life outweighs speed; shares identical pinout and register map |
| ADS7822U | 200 kSPS, 2.7 V–5.25 V supply, no internal reference - requires external 2.5 V reference and calibration support | Suitable for designs already using precision external references or needing higher CMRR than pseudo-differential topology | Choose when reference accuracy or sourcing flexibility is prioritized over integration and ease-of-use |
Compared with AD7853LBRZ-REEL, the AD7853BRZ-REEL trades 2× lower power for 2× higher throughput and retains identical calibration architecture and interface flexibility; versus ADS7822U, it offers superior integration at the cost of fixed reference voltage and less configurable input topology.
Availability
AD7853BRZ-REEL is available at Aetrix Electronics and suitable for portable medical instrumentation, battery-powered data loggers, industrial control loop sampling, and pen-based computing interfaces requiring stable component supply and long-term obsolescence management.
Supply support for AD7853BRZ-REEL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7853 series belongs to Analog Devices' precision SAR ADC product line, designed specifically for portable, low-power, and calibration-critical measurement applications where integration, reliability, and ease of use are essential.
FAQ
What is the maximum recommended master clock frequency for AD7853BRZ-REEL?
The AD7853BRZ-REEL supports a maximum CLKIN frequency of 4 MHz across its full operating temperature range (–40°C to +85°C). At this clock rate, conversion time is 4.6 µs and self-calibration completes in 31.25 ms. Exceeding 4 MHz violates absolute maximum ratings and may cause timing violations or data corruption in the AD7853BRZ-REEL serial interface.
Does AD7853BRZ-REEL require external reference components?
No - the AD7853BRZ-REEL integrates a 2.5 V reference with 20 ppm/°C drift and provides REFOUT functionality. However, two external capacitors are mandatory: 0.1 µF (CREF1) and 0.01 µF (CREF2), both connected to AGND. These stabilize the internal DAC and reference buffers; omitting them degrades INL and noise performance in the AD7853BRZ-REEL.
How does the AMODE pin affect analog input configuration in AD7853BRZ-REEL?
The AMODE pin selects between two hardwired input ranges in the AD7853BRZ-REEL: Logic 0 configures unipolar mode (0 to VREF), where AIN(+) must stay ≥ AIN(–); Logic 1 enables bipolar mode (±VREF/2), requiring AIN(–) biased to +VREF/2. This hardware-selectable range eliminates software register writes and ensures deterministic analog behavior at power-up.
Can AD7853BRZ-REEL operate as a read-only ADC without any serial communication?
Yes - the AD7853BRZ-REEL powers up in read-only mode with default settings. With DIN tied to DGND, CONVST used for conversion triggering, and BUSY monitored for completion, full 12-bit data can be read serially without writing to any internal register. This simplifies firmware and reduces risk of misconfiguration in the AD7853BRZ-REEL.
What is the guaranteed minimum acquisition time after BUSY goes low in AD7853BRZ-REEL?
The AD7853BRZ-REEL requires a minimum of 400 ns between the falling edge of BUSY and the next rising edge of CONVST to ensure proper settling of internal circuitry before the next conversion cycle. This timing constraint applies regardless of interface mode and must be enforced in hardware or firmware to maintain 12-bit accuracy across temperature and supply variations in the AD7853BRZ-REEL.
AD7853BRZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 3V ~ 5.5V
- Voltage - Supply, Digital:
- 3V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7853BRZ-REEL FAQ
1.How can I place an order for AD7853BRZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7853BRZ-REEL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7853BRZ-REEL reliable?
The price and inventory of AD7853BRZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7853BRZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7853BRZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7853BRZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7853BRZ-REEL?
AD7853BRZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7853BRZ-REEL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7853BRZ-REEL?
For technical support, including AD7853BRZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7853BRZ-REEL requirements.
6.How does Aetrix verify that AD7853BRZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7853BRZ-REEL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7853BRZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7853BRZ-REEL?
All AD7853BRZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7853BRZ-REEL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7853BRZ-REEL part is unused and in its original packaging.
Return procedure for AD7853BRZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7853BRZ-REEL Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
